The functions and effects of the heart

The heart is the most important organ in the human body. Blood circulates through the heart to various parts of the body every day. If the heart stops beating, the body's blood supply system will stop, and brain death will follow, so we must protect our heart. The heart supplies oxygen and nutrients needed by the human body by pushing blood circulation, while also taking away metabolic products. Many people have heart disease since birth, and such people should be more careful not to stimulate their hearts.

①The heart is one of the most important organs in the body of vertebrates. Its main function is to provide pressure for blood flow and circulate blood to all parts of the body. The human heart is located in the lower left middle of the chest cavity. It is about the size of a fist and weighs about 250 grams. Women's hearts are generally smaller and lighter than men's. The human heart is shaped like a peach and is located above the diaphragm, between the two lungs and slightly to the left.

②The function of the heart is to promote blood flow, provide sufficient blood flow to organs and tissues to supply oxygen and various nutrients, and take away the end products of metabolism (such as carbon dioxide, uric acid, etc.) so that cells maintain normal metabolism and function. Various endocrine hormones and some other humoral factors in the body also need to be transported to target cells through blood circulation to achieve the body's humoral regulation and maintain the relative constancy of the body's internal environment. In addition, the realization of the blood's defense function and the relatively constant regulation of body temperature also depend on the continuous circulation of blood in the blood vessels, and the circulation of blood is achieved due to the action of the heart "pump".

③The main function of the heart is to pump blood to maintain the body's metabolism. Moreover, the amount and speed of blood pumped can change at any time due to changes in the functional state of the human body. In addition, it is worth mentioning that in addition to being a power organ, the heart is also an endocrine organ. Cardiomyocytes can also synthesize and secrete the peptide hormone atrial natriuretic peptide. Its main function is to relax vascular smooth muscles and promote the excretion of sodium and water by the kidneys. It can also inhibit the production of other hormones, such as renin, aldosterone and vasopressin. It is an important peptide hormone in the human body.